METHOD OF CLASSIFICATION OF OBJECTS ADAPTED TO HYDROACOUSTIC CONDITIONS Russian patent published in 2017 - IPC G01S15/00 

FIELD: physics.

SUBSTANCE: method of classifying objects adapted to the operating conditions in which the signal is emitted, receiving an echo from the receiving antenna object, sampling the input information, calculating a threshold over the average value of all samples, detecting the excess of the selected threshold, measuring and storing the amplitudes of samples exceeding threshold; measuring and storing the numbers of samples exceeding the threshold, and produce information on the indicator, measure the distribution of the cut of the speed of sound C in depth H, calculate the path of propagation of the rays, determine the distance of the beginning of the output of the rays to the surface D_start, the distance from which the rays exit to the surface D_end. If there is no ray output to the surface, then the distance of the change in the direction of the D_meas rays, determine the time of the first exceeding of the echo above the interference, measure the duration of the echo signals of the T_echo from the number of counts, Which reached the threshold, with the duration of the echo signal T_echo<T_p, where T_p is the maximum duration of the echo signal from the object, determine the distance to the object D_ob from the time position of the maximum echo amplitude, determine the presence of the illumination zone on the surface and the duration of the echo T_echo2, if the duration of the T_echo2>T_p is determined from the reflected echo signal, this duration determines the width of the illumination zone, from the counts that exceeded the detection threshold, the distance is measured before the start of reflection from the surface of the illumination zone D_start according to the time reference of the beginning of the zone, it is decided that the target A single, if D_ob<D_start, measure the distance to the end of the reflection from the D_kon surface from the time countdown of the end of the duration of the zone and decide that the target is underwater if D_end<D_ob, in the case when Techo₂ is absent, and calculating the trajectory of the rays do not go to Surface, it is decided that the target is underwater, if D_meas<D_ob<D_meas, where the distance is the estimated distance of the signal propagation path, otherwise the decision is rejected.

EFFECT: providing the classification of an object detected by a short-range hydrolocator in automatic mode.

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